Obama attempted to move control of the Census Bureau from the Commerce Department to the White House, to be managed by then Chief of Staff Rahm Emmanuel. 6. Obama had provided under the radar amnesty to illegal immigrants by allowing ICE Director John Morton to prohibit ICE officers from enforcing US immigration laws.
The primary enzymes responsible for DNA replication are DNA polymerases. Understanding the activity and limitations of DNA polymerases help in making sense of why DNA replication occurs the way it does. Key points are: 1  Prokaryotic cells contain three different DNA polymerases.2  Each have slightly different activities.uring DNA replication a DNA double helix must unwind and separate so that DNA polymerase enzymes can use each single strand as a template for the synthesis of a new double strand. Strand separation is catalyzed by a Helicase enzyme.
Consistent with a role for DnaA in the size-dependent regulation of replication initiation, significantly reducing DnaA expression delays initiation and increases cell size, while overexpressing DnaA leads to premature initiation and a reduction in cell size in both E. coli and B. subtilis 14 and 23.